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Minco Explosion Proof Platinum RTD Transmitter TT881

Minco Explosion Proof Platinum RTD Transmitter


The Minco Model TT881 explosion proof platinum RTD transmitter is designed for temperature measurement in applications calling for a rugged industrial housing. This RTD transmitter may be ordered for 100 ohm and 1000 ohm 385 platinum RTD or 1000 ohm 375 platinum RTD.


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  • Class I, Division 1, Groups B, C, D
  • Class II, Division 1, Groups E, F, G
  • NEMA 4X, 7BCD, 9EFG
  • Availible in 100Ω or 1000Ω RTDs
  • High RFI/EMI immunity
  • NIST certificate available
  • 4-20 mA loop powered
  • Substitute replacement for discontinued HCT-881 Hy-Cal transmitters

Supply Voltage:10-35 VDC (reverse polarity protector)


Accuracy:±0.1% of span


Zero:-58° to 122℉ (-50° to 50℃)

Span:45° to 1080℉ (25° to 600℃)

Zero Span Adjust:Noninteractive

Output:4-20 mA, two-wire standard

Input Voltage Effect:0.001% of span/volt max (negligible) for 10-45 VDC

Linearity:±0.2% of span for any range from -58° to 1022°F (-50° to 550°C)

Temperature Coefficient:±0.002% of span/℃

Enclosure Rating:NEMA 4X, FM approved*, explosion-proof Class I, Div 1, Groups B, C, D; Class II, Div 1, Groups E, F, G

Terminations:Terminal Screws


Immersion:Includes an integral sensor mounted via 1/2" NPT threads with 1/4" probe

Wall/Pipe:Mounting hardware available for surface installations with accessory AC103168

Maximum Load:(Supply voltage - 10 VDC) / 0.02A, i.e., (24-10 VDC) / 0.02 = 700Ω


Temperature Range:-58° to 500°F (-50° to 260°C)

Sensing Element:

PD :100Ω, 385 platinum, three-wire sensor 0.00385 Ω/Ω/°C

PF :1000Ω, 385 platinum, two-wire sensor 0.00385 Ω/Ω/°C

PW :1000Ω, 375 platinum, two-wire sensor 0.00375 Ω/Ω/°C

Ice Point Resistance [Ro]:100Ω ±0.1Ω, ±0.12%

1000Ω ±1Ω, ±0.12%:

Stability:Better than 0.25°C per year

Insulation Resistance:Sheath: 500°F (260°C), 100 mΩ @ 50 VDC min

Probe Material:Stainless steel body

Area:Explosion proof Class I, Div 1, Groups B, C, D; Class II, Div 1, Groups E, F, G; NEMA 4X with thermowell; without thermowell, explosion proof indoor only Factory Mutual*, File #3012833

Pressure:2750 psig (18,961 kPa) max @ 500°F

Operating Temperature:-40° to 185°F (-40° to 85°C) noncondensing

Standard Length:5.5"L (13.97 cm), 0.25" (0.64 cm) probe, 1/2" NPT mounting

Weight (5.5″ length):5.6 lb (2.54 Kg)


Warranty:3 years

*:* Minco AS7220 sub-assembly only


Download Additional Data

document   TT881 Catalog Page
document   TT881 Installation Instructions